Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Em qual torneio Pete Sampras começou sua liderança?
 ###Tabelas: CREATE TABLE chronological_list_of_grand_slam_singles_titles_leaders (chronological_list_of_grand_slam_singles_titles_leaders_id AUTO_INCREMENT PRIMARY KEY, Years led VARCHAR, Span of years led INT, Player VARCHAR, Titles won at point of lead INT, Total Career titles INT, Tournament at which lead began VARCHAR) CREATE TABLE top_36_results_summary (top_36_results_summary_id AUTO_INCREMENT PRIMARY KEY, Name / Name of Act VARCHAR, Age(s) VARCHAR, Genre VARCHAR, Act VARCHAR, Hometown VARCHAR, Semifinal (Week) INT, Position Reached VARCHAR) CREATE TABLE overall (overall_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, Nation VARCHAR, Gold INT, Silver INT, Bronze INT, Total INT) CREATE TABLE 1980–1989 (1980–1989_id AUTO_INCREMENT PRIMARY KEY, January VARCHAR, February VARCHAR, March VARCHAR, April VARCHAR, June VARCHAR, July VARCHAR, August VARCHAR, September VARCHAR, October VARCHAR, November VARCHAR, December VARCHAR) CREATE TABLE qualification_round (qualification_round_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Athlete VARCHAR, Country VARCHAR, Day 1 INT, Total INT)  
SELECT Tournament at which lead began FROM chronological_list_of_grand_slam_singles_titles_leaders WHERE Player = Pete Sampras